Write or print on letter per piece of paper so you have 26 papers each with a letter on them. Set them on the floor or tape them down, and have the kids jump to the letter you say. It's like hopscotch and letter drills all in one.
Write simple math problems on a white board and hold it up for the kids to see. Have them solve the problem in jumping jacks! Example 2 + 1 = 3 jumping jacks. Counting and moving at the same time requires concentration so it may take a few times to get them even if they know the answer to the math problem.
Here's another paper hopscotch type game. Only instead of the Alpheratz write questions on papers and lay them down to jump to. Roll a dice and you can play it just like a board game where your kids are the pieces. Questions on these "cookies" can be things like "what's your name", "what's your phone number", "what's your mom's name", "where do you live", and "how old are you?" Tell the kids that the ground is peanut butter and if they get stuck in the peanut better pond they'll be out! They have to jump on the cookies (papers) and answer them correctly! Want to add a little fun make some yummy cookies to go along with the game when they answer correctly!
Mix It Up: Use kangaroo cookies game for tests! Quiz on subjects you've been learning this way such as history chapters, astronomy questions, shapes, family history etc.